Results 1 to 5 of 5

Thread: Just did an experiment with one of my goodnites, Extremely surprised at how much it holds

  1. #1

    Default Just did an experiment with one of my goodnites, Extremely surprised at how much it holds

    I decided to take one of my goodnites( at random) ( new 2011 version) and pour water from measuring cups into the diaper.... I stopped at 9.25 cups, which equals 74 fluid OZ..... I estimate that .25 of 1 cup leaked out ( at various points, because I wasn't being careful enough with where I poured it. At 72- 74 oz,it became extremely full, stiff, and kinda difficult to put on. The outside of the diaper was totally dry, and I could have kept pouring more water ( maybe tomorrow Ill see what its absolute limit is - probably not more than 1 more cup)... I had to make room for my junk. I only wore it for about a minute because it was putting pressure on my testicles. Then I took it off and placed it on a plastic bag under my bed so that if osmosis occurs, my floor will not get wet.

    I am going to do this with one of my older( last year's) goodnites for comparison.

    Obviously, this is not a scientific test, because I'm not going to repeat it on my other 2011 goodnites ( maybe If I get another pack I will), so it is totally possible that this one had more SAP than the average goodnite. However, this diaper was randomly chosen for testing amongst a pack of 27,so there is no reason to suspect that the average diaper is Much better or worse in terms of Maximum absorbency.

    In practice one will obviously not get this kind of performance because:

    a.) after a few cups of urine, the diaper starts to sag and, for me at least, urine starts leaking out of the Back of the leg cuffs where a gap forms ( due to the diaper's wieght)

    b.) if you go to fast, urine can over run the top of the leakgaurds and leak out of the diaper before it can be absorbed.

    c.) Due to the natural landing spot from human anatomy, urine will not spread over the entire diaper.In particular, urine tends to land and pool between the legs, and towards the seat of the diaper. Even if it is contained initially, osmosis begins well before the 72+ OZ I reached during the experiment ( and when I stopped there still wasn't any osmosis).

    d.) When wearing the diaper,one puts pressure on the sap, which over time, can force some of the liquid out. In addition, after a certain point,it becomes so swollen, that it doesn't fit well any more

    e.) For men, the rate of urine as well as the max absorbency will depend on the position of the penis. For me, if it is placed so that urine can flow past the testicles, and to the back of the diaper, I can "flood" much more than if the testicles block the flowof urine forcing it up the diaper. In the latter case, urine flows up and over the leak gaurds before the diaper can absorb it.

    I estimate that in practice, for me, the diaper has an effective capacity of 20 - 32+ Oz( then it usually starts leaking due to case a).

    In the future,I'd like to buy my own set of measuring cups ( used my parents ofr this so only used water) and find out how many cups my average urination amounts too.
    Last edited by curious88; 27-Mar-2012 at 20:48.

  2. #2


    If you want to test it under wearing conditions, weigh the diaper dry before you put it on and then weigh it again when it is full/at leaking point, compare the difference in weights and you will have the amount of fluid absorbed.

  3. #3


    I need to get a scale first. Also, the purpose of this test is maximum absorbency. I estimated effective absorbency at the end based on the average weight of the diaper when it starts leaking, and time of urination.

  4. #4


    Note that there is a significant difference between maximum usable capacity and maximum capacity in most products. I don't really see much use in measuring maximum capacity unless you are performing some kind of science experiment and comparing against what the brand claims is their maximum usable capacity.

    This might be interesting to you:

    This is how xpmedical gets their numbers for the diapers that they offer:

    These are the numbers in question:

  5. #5


    I noted this im my OP. and Yeah, I've seen similar lists before ^

    ---------- Post added 06-04-2012 at 15:31 ---------- Previous post was 27-03-2012 at 15:48 ----------

    I just wanted to bump this becuase I thought there were interesting results

Similar Threads

  1. I'm a little surprised...
    By KuuKuu in forum Diaper Talk
    Replies: 17
    Last Post: 29-Feb-2012, 04:05
  2. surprised to see such a community!
    By bambinod in forum Greetings / Introductions
    Replies: 20
    Last Post: 20-Jul-2010, 14:28
  3. California Supreme Court Holds Up Prop 8.
    By Fire2box in forum Mature Topics
    Replies: 48
    Last Post: 31-May-2009, 15:47

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  • - the Adult Baby / Diaper Lover / Incontinence Support Community. is designed to be viewed in Firefox, with a resolution of at least 1280 x 1024.